aspheric lens optimized to collimate Nichia’s blue laser diode?

[ryanlee]

has anyone seen this make of lens before? it's a aspheric lens that has been optimized to collimate Nichia’s blue laser diodes.

 

[Alaskan]

Damn, I'd open that PDF, but I never open those files on the net from sources I don't know, they can be infected.

 

[ryanlee]

here it is as a jpg uploaded here, the pdf which is also uploaded here is much better.

this is the text...

• Optimized for Nichia® blue laser
• Compatible with other blue diode lasers
• Aspheric molded glass lens
• Diffraction limited performance
• Compact, single lens design
• Short wavelength provides smallest spot

LightPath’s 352673 molded glass aspheric lens is optimized to collimate
Nichia’s® blue laser diode, and is manufactured and designed to meet
extremely stringent optical standards.

Achieving good beam quality is particularly difficult for shorter
wavelength lasers. The 352673 molded glass aspheric lenses are
designed for the specific beam divergences, peak wavelength and
window material of commercial blue diode lasers, enabling blue laser
applications to achieve excellent beam quality and performance.
Working with lasers from 400 nm to 415 nm with a design centered
at 408 nm per the laser manufacturers’ specification, this design
was optimized with a very large and forgiving clear aperture and is
also compensated for the laser manufacturers’ variation in window
thickness.

The 352673 lens utilizes LightPath’s ECO-550 glass, a lead-free
alternative to traditional moldable glasses. This glass is fully RoHS
compliant, in accordance with the new European restrictions on
hazardous substances.

 

[Alaskan]

I found that doc here: http://www.amstechnologies.com/fileadmin/amsmedia/downloads/3244_Blue_Laser.pdf - Sorry brother, but I'm not opening any attachment from someone I don't know on any forum, I'm too paranoid.

What are you asking for, to get our opinion? Looks a lot like the "G2" lens we use which have very low loss, but higher divergence compared to a three element lens, due to its shorter FL producing a smaller diameter beam.

 

[ryanlee]

to get our opinion?

yes, could it be noticeably better with Nichia’s blue laser diodes than a standard "G2" lens since it is designed specifically for them?

 

[Alaskan]

It is designed for a short wavelength, that is a plus, the AR coating can be purchased for 400-600 nm, another plus. If I were to want maximum light from a diode and didn't care about the divergence as much, I'd use those.

 

[lasersbee]

I guess the price would also be a factor....
How much are these lenses...:thinking:

Jerry

 

[ryanlee]

I guess the price would also be a factor....
How much are these lenses...:thinking:

Jerry

expensive, $145.00 US! for that amount money i would expect them to out preform a standard "G2" lens by a fair amount.

 

[RedCowboy]

It's fun to experiment with larger lenses, just be safe, wear those safety glasses.

 

[Alaskan]

Yep, when experimenting it is too easy to get a reflection, I recently purchased more glasses and had them sent out to me here for later.

RyanLee, those are damn expensive tiny little lenses, I didn't believe you and went looking:

 

[Alaskan]

10 mm clear aperture, ought to be low divergence that big, too bad not for blue and for 600nm and longer IR to 1050nm: https://www.ebay.com/itm/122716618230

 

[Singlemode Laser]

These lenses can be bought for ~80$ here:

https://www.edmundoptics.com/optics...enses/Blue-Laser-Collimating-Aspheric-Lenses/

Like people already said they are mostly for scientific lasers that need to reduce back-reflections.
As a plus the superior coating and the high transmittance glass material increase the power. Especially the optics in the UV region from 350nm-400nm suffer from high losses.

Singlemode

 

[ryanlee]

These lenses can be bought for ~80$ here:

https://www.edmundoptics.com/optics...enses/Blue-Laser-Collimating-Aspheric-Lenses/

Like people already said they are mostly for scientific lasers that need to reduce back-reflections.
As a plus the superior coating and the high transmittance glass material increase the power. Especially the optics in the UV region from 350nm-400nm suffer from high losses.

Singlemode

no, not the 352673A, i live chatted with a sales rep and they said they don't carry the 352673A lens and they couldn't get them.

 

[Singlemode Laser]

no, not the 352673A, i live chatted with a sales rep and they said they don't carry the 352673A lens and they couldn't get them.

Of coarse Edmund is selling their own lenses and not the ones from ams, but the specs and dimensions for the 4.02mm focal length diode are almost identical. There is just only very little variance in a form of an aspherical high NA lens.

Singlemode

 

[ryanlee]

Edmund Optics is a distributor of LightPath lenses...

Customers have access to LightPath’s most popular molded glass aspheric lenses and assemblies, infrared lenses and thermal imaging assemblies, fused fiber collimators, and gradient index GRADIUM® lenses directly from Edmund Optics.

https://www.edmundoptics.com/products/lightpath-lenses/

yet they don't carry the 352673A lens and for some unknown reason they can't get them but she would not elaborate why that is?

 

[steve001]

Of coarse Edmund is selling their own lenses and not the ones from ams, but the specs and dimensions for the 4.02mm focal length diode are almost identical. There is just only very little variance in a form of an aspherical high NA lens.

Singlemode

Edmund Optics is a distributor of LightPath lenses...



https://www.edmundoptics.com/products/lightpath-lenses/

yet they don't carry the 352673A lens and for some unknown reason they can't get them but she would not elaborate why that is?

It appears the Edmund lenses are compatible and certainly much less expensive.